Marking tool



S. A. WEAVER.

MARKING TOOL.

APPLICATION FILED FEB. 9. 1921.

MLQS QMO Patented Jan. 11,1922.

SAF/I'UEL A. VTEAVER, 0F TI'UGNDEROGA, NEW' YQRK.

araarrnve noon.

Application filed February 9, 1921.

T 0 all w iwm it may concern Beit known that I, SAMUEL A. WEAVER, a citizen of the United States, residing at Ticonderoga, in the county of Essex and State of New York, have invented certain new and useful Improvements in Marking Tools, of which the following is a specification.

My invention relates to stamping tools, and more particularly stated contemplates a hand operated pressure stamp for affixing karat and similar marks to jewelry and other articles.

In practice it is customary to afiix this mark by means of a punch, one end of which is provided with a karat mark and the other end of which is adapted to be struck a blow. Certain attempts have also been made to produce power presses for affixing these marks but this type of mechanism is of expensive and complicated construction thereby rendering it wholly inadequate for the practical use contemplated by this present invention.

It is an object of my invention to produce a comparatively simple, inexpensive and ef fective punch, provided with an operating device capable of transmitting a maximum, uniform pressure for evenly affixing the mark, by a gripping action of the hand.

Another object of my invention is the production of a hand operated tool provided with'pivotally associated complementary members one of which is provided with a marking die and the other of which is formed with a work supporting surface, adapted to cooperatively retain the work in alinement with the marking die for evenly afiixing the mark, said alinement or centering being effected by the moving of said complementary members toward'each other.

Another object of my invention is to produce a hand operated marking tool having coacting marking devices between which articles can be quickly positioned and rapidly marked, the said marking devices being detachably secured in said tool for purposes of removal and the insertion of other marking devices as will be understood.

-'V7ith these and other objects in view my invention further consists in the ar- Specification of Letters Patent.

Patented Jan. it 1922.

Serial are. 443,566.

rangement and construction of the several parts hereinafter described and pointed out lathe appended claims.

in the accompanying drawings illustrating an embodiment of my invention:

big. 1 is a side view of the tool;

Fig. 2 is a horizontal sectional view on the line 2-2of Fig. 1;

Fig. 3 is an enlarged view illustrating in end elevation my tool with an article positioned therein;

Fig. 4 is a detail sectional view showing the curved work supporting surface and the coacting punch or die engaging and centrally positioning the work therein;

Fig. 5 is a similar view taken at right angles to Fig. l;

Fig. 6 is a detached view illustrating in perspective the marking die and work support; and

Fig. 7 is a detached perspective view of a modified form of work support.

My present lnventlon has been designed to racilitate the accurate and rapld marking of articles of manufacture, and while pri marily constructed for use in applying the karat and similar marks to jewelry, I do not limit myself to such use only, it being capable of use in connection with many other devices and articles as will be understood.

Referring to the drawings, the tool in cludes complementary marking members 1 and 2; pivotally connected by the pin 3, and an operating device for said members comprising associated. levers 4 and 5 pivotally connected. at 6 and 7 respectively to the marking members and to each other as at 8. The association of the foregoing levers serves to increase or compound the pressure transmitted to the marking members and as shown the parts are interconnected by the bifurcation of one element and. the insertion of the other element to form a' durable and efiective three-part joint. It will be understood, however, that these pivoted con nections may be of other constructions and I do not limit myself to the exact structure shown.

The relative location of the pivotal connections is shown, in Fig. 1, the pivotal connections 6 and 7 being in alinement with tially parallel each other, and the pivotal connections 3 and 8 also being alined with each other, but not alined with the aforesaid pivotal connections 6' and 7. As movement is imparted to the operating hand levers 4 and 5 the pivot 8 is shifted relatively to the pivot 3, thereby moving the interconnected pivots 6 and 7, and in turn the complementary marking members 1 and 2 to which latter the hand levers are pivotally con nected. The relative lengths of the arms of the complementary members as well as the distance between the pivotal connections may be varied as will be understood. It is desirable, however, to maintaina substanposition of the complementary members, when in marking position as shown in Figs. 1 and 3.

Each marking member 1 and 2 is provided respectively with coacting impression devices. A marking die 9 provided with a square shank 10 is positioned in an opening formed in the outer end of the complementary member 1. The die is held in position by means of a set screw 11 threaded into the front face of the member 1 as shown. suitable cutting or pressing face is provided on the die and in the present embodiment is shown as a karat mark or stamp. The cutting face is formed on the die head 12 which as shown is formed with a surrounding or flat shoulder 13 adapted to bear against the flat under surface of the complementary member 1. By this construction the marking die is firmly held and secured in proper position for engaging the work. In practice several of these dies will be used each having a different cutting surface as will be understood, but all of them being preferably .formed with a standard shank of a size corresponding to the opening provided in the member 1.

Cooperating with the marking die 9 is a work support or die plate 14 fitted into the cut-away portion 15 of the complementary member 2.- This work support is of relatively hard material and is shaped to complete the contour of the end of the member 2 as shown. A positioning and retaining pin 16 1s carried by the work support and is adapted to fit into an opening 17 provided in the member 2. Threaded into the outer face of the member 2 is a set screw 18 arranged to bear against the pin 16 and secure the work support inplace.

. The work support 14 is formed with a con cave surface or depression 19, the deepest portion of which is arranged beneath and centrally located with respect to the marking the 9. It is also preferably located to one side ofthe pin 16 as shown. The curvature of the surfa e 19 as well as its relative depth may be varied in that it may be elliptical, or

of hyperbola or other contours. The curved surface may also be corrugated or otherwise interrupted to permit of the exact centering of the articles to be stamped. In operation, it will be seen that the article, a ring It for example, as shown in the drawings, is first inserted in the depression and then engaged by the marking die 9 by pressing the levers 4 and 5. The effect of this initial engagement of the article by the marking die 9 is to bring it directly beneath the die or to the lowermost portion of the depression. A continued pressure'now serves to impress the mark in the article in even and accurate alinement with respect to the portion of the article to which the stamp is aflixed. It will also be seen that articles hav ing curved surfaces not in exact conformity with the depression at all points thereof will be centered by the initial engagement of the marking die. v

The substantially parallel and simultaneous movement of the complementary members 1 and 2 toward each other also serves to accurately and evenly affix the mark, the degree of gripping pressure exerted by the hand preferably determining the depth of A the mark as will be understood.

Another embodiment of work supporting plate 20 is shown in Fig. 7 In this form the coacting surface is flat and is designed for marking articles having fiat faces as will be understood. Various other forms of work holding die plates may be substituted and I do not limit myself to the disclosures herein.

The ends of the complementary members 1 and 2 may be chamfered as at 21 or otherwise cutaway to permit of the marking of relatively small articles. The positioning of the set screws 11 in the front or end faces of the complementary membersalso permits of the positioning of small rings and similar 1 articles between the marking devices.

From the foregoing it will be apparent that I have produced a readily usable stamping tool, the use of which materially improves the character and quality of the mark 11 impressed, and permits of great saving in time.

Various changes in the arrangement and construction of the several parts may be resorted to, and I do not limit myself to the exact structural details set forth.

I claim: I

1. A stamping or impressing tool for affixing a karat or similar mark to articles, the outer surface of which is curved, said tool comprising complementary members pivotally connected together for cooperative pressing action, a work support carried by one of said members and having a concave surface thereon for receiving curved articles, and a marking die carried by the other of said members, said die being positioned centrally of said concave surface for engaging and alining the article to be stamped between the lowermost surface of the concave die, and means for evenly alining the mark with respect to the article receiving the same upon the initial engagement of the Working 10 die with the article.

In testimony whereof I affix my signature.

SAMUEL A. WVEAVER. 

